Fan Mount for Raspberry Pi 4 with Heat Sink Case

thingiverse

A snap-on fan case for use with a passive heat sink case (https://www.adafruit.com/product/4341). The fan version of that case uses those little fans that don't really push any air. This clip-on holds a Noctua 40x40x10mm 5V fan (or equivalent) to keep things cool. There's a duct to route the wires to the Pi GPIO pins to connect up. I’m only using +5 and Gnd but anyone wanting to do PWM control or RPM monitoring should keep the GPIO voltage limits in mind. It clamps pretty tight and only makes things a little bigger. It does cover the POE and camera port. Might add a base to keep the bottom plate off the table so work in progress? Got my fan hooked up and with zipping up a big tarfile with other loads running to get the load to ~2.5 as reported by top, temperatures as reported by vcgencmd measure_temp never got above 30C. Just normal loads and I get 24-26C in a 68F ambient room. I used Fujipoly Ultra Extreme thermal pad with a 17.0 W/mK rating with the heat sink and the whole assembly would get only mildly warm running a desktop but I wasn't really trying to heat it up. I think that fan with the heat sink and the Fujipoly and it can probably take whatever anyone wants to throw at it without getting hot or throttling. I'd be curious what numbers others get.